Rapid loading magazine with reusable magnetic loading strip

ABSTRACT

An apparatus and system for loading a firearm magazine by loading all cartridges at once. According to embodiments of the present disclosure, a firearm magazine has a cartridge guide that can be locked such that the loading spring is locked in a compressed position. A loading strip that is preloaded with cartridges may be loaded into a magazine and slidably removed to load all cartridges at once. Upon loading the cartridges, the cartridge guide may be unlocked such that the spring may enable the cartridge guide to feed the cartridges into a chamber when engaged with a firearm.

RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application61/797,730, filed Dec. 14, 2012, hereby incorporated by reference.

FIELD

The present disclosure relates to the field of firearms, in particular anovel cartridge magazine for improved speed in loading a firearm.

BACKGROUND

Many solutions exist in the prior art exist for minimizing the loadingtime for a firearm magazine. While many of these solutions promote amore durable magazine, reduce the dexterity required by the operator, orallow greater simplicity of loading cartridges, all prior art solutionsstill require the operator to load cartridge one at a time or require abulky ammunition cartridge to remain in the magazine and reduce thereliability of the firearm and increase cartridge jamming. A standardrifle magazine holds 30 cartridges. Loading a 30 cartridge magazine,even with the enhancements provided by some of the prior art solutions,still requires approximately one second or more per bullet. Despite theenhancements provided by the prior art, it still takes an operator atleast 30 seconds to load a standard 30 cartridge magazine.

Gaidos U.S. Pat. No. 1,797,951 discloses a firearm magazine with a flatsliding plate for closing a side of its magazine chamber. However, itincludes a slidably mounted latch sensitive to dirt and debris adverselyaffecting its operation. Also, the plate has slots machined along itsedges for slidingly engaging inwardly-deformed edges of the magazinemember. The slots are expensive to machine, and further the slots form anarrow track that may trap dirt and debris adversely affectingslidability of the plate, especially when the magazine is being loadedin dirty environments. Gaidos, like Brown, also discloses an open slotalong its length that potentially allows debris to enter the magazine,thus greatly reducing its resistance to intrusion of debris. Also, apull ring protrudes from an end of the plate and, along with the latch,is subject to getting caught on objects when manipulating the magazine.

Kim U.S. Pat. No. 4,688,344 discloses a separate loading apparatus thatcontains the ammunition for insertion into the magazine. This design isoverly complex and uses many extra parts that would be cumbersome tocarry or use. The process needed to load a magazine with this design isalso more tedious than the conventional one-by-one loading method.

Guy et al. Patent Application Publication No. 2005/0081421 A1 disclosesa “Heavy Duty Magazine Loader” that again requires the loading of ashell loader prior to loading the magazine itself. This design requiresa multitude of heavy parts for its construction. The design of thisloader is bulky, overweight, and is far from portable. It also does notallow for the loading of a magazine where the ammunition is inserted onan angle, such as most semi-automatic handgun magazines.

Ball U.S. Pat. No. 2,862,324 discloses a “Clip Slide Depressor.” This isyet another separate item that has to be carried by the user. The user'shands could just as easily accomplish the function that this designperforms. This concept arguably offers no real advantage to loading amagazine.

Herpel Patent Application Publication No. US 2005/0150148 A1 discloses amagazine having a cord attached to the follower for pulling the followertoward the base to relieve the spring tension that would otherwiseoppose the force of inserting ammunition. This concept requires the useof a ring at the bottom of the cord that remains extended from themagazine housing when the magazine is filled with ammunition. The cordand ring could easily be caught on objects while the magazine isdispensing the ammunition into the firearm, hence jeopardizing thecritical function of the magazine's dispensing action. The cord also hasthe possibility of becoming tangled with the inner workings of themagazine, hence jeopardizing the function of the magazine. This conceptalso allows for the possibility that a round of ammunition could beinserted in the correct direction, but tumble while falling to thebottom and landing in the wrong direction.

Phillips U.S. Pat. No. 6,807,764 B1 discloses an object similar to thatof the Ball U.S. Pat. No. 2,862,324. This is yet another separate itemthat has to be carried by the user. The user's hands could just aseasily accomplish the function that this design performs. This conceptarguably offers no real advantage to loading a magazine.

Pikula U.S. Pat. No. 6,678,985 B2 discloses a magazine-loading tray.This concept has little, if any, advantage over conventional one-by-oneloading. The tray must be loaded, then the magazine must be loaded usingthe tray, providing no clear advantage to the user. This design is alsoquite bulky and would not be very portable.

No solution exists that allows a firearm user to load an entire 20 to 30cartridge magazine in one step, while also eliminating any cartridgecasing or strapping from remaining inside the magazine thereby ensuringfirearm reliability. What is needed, therefore, is an apparatus andsystem that enables a user to load an entire firearm magazine at once,and allows the user to user off-the-shelf cartridges without anyadditional strapping or casings.

SUMMARY

The following presents a simplified summary of some embodiments of theinvention in order to provide a basic understanding of the invention.This summary is not an extensive overview of the invention. It is notintended to identify key/critical elements of the invention or todelineate the scope of the invention. Its sole purpose is to presentsome embodiments of the invention in a simplified form as a prelude tothe more detailed description that is presented later.

An object of the present invention is an ammunition loading apparatuscomprising a first surface, the first surface being substantially planarand shaped to correspond with a contour of a firearm magazine; a sidewall disposed substantially along a perimeter of the first surface andterminating at a distal end of the first surface defining an opening andan interior portion, the side wall being contoured at a distal portionopposite the opening defining at least one cartridge contour; a magneticportion disposed substantially along a length of the first surfacedefining at least one cartridge row within the interior portion; and, ahandle coupled to a distal potion of the side wall and the first surfaceadjacent to the at least one cartridge contour.

Another object of the present invention is an apparatus for storingcartridges for a firearm, with each cartridge including a hollow shellcarrying a bullet at a first end thereof and having a circular bottom atan opposite second end thereof, comprising an elongated housingconfigured to selectively engage with a firearm, the housing having sidewalls and a base defining sides, a bottom and an opening disposedsubstantially along a side portion, and the housing having a channeldisposed substantially the length of the housing and configured to beslidably coupled with an ammunition loading strip, the ammunitionloading strip having a first surface, a side wall disposed substantiallyalong a perimeter of the first surface and terminating at a distal endof the first surface defining an opening and an interior portion, theside wall being contoured at a distal portion opposite the openingdefining a first cartridge contour, and a magnetic portion disposedsubstantially along a length of the first surface defining a cartridgerow within the interior portion; a cartridge guide, the cartridge guidebeing slidably coupled with an interior portion of the housing, and thecartridge guide having a handle coupled to a cartridge rest; and, acartridge guide lever having a protrusion selectively engaged with anaperture of the cartridge guide, and disposed on a lower portion of thehousing.

Yet another object of the present invention is a firearm magazine systemcomprising a housing configured to selectively engage with a firearm,the housing having side walls and a base defining sides, a bottom and anopening disposed substantially along a side portion, and the housinghaving a channel disposed substantially the length of the housing andconfigured to be slidably engaged with an ammunition loading strip; acartridge guide, the bullet guide being slidably coupled with aninterior portion of the housing, and the cartridge guide having a handlecoupled to a cartridge rest; a cartridge guide lever having a protrusionselectively engaged with an aperture of the cartridge guide, anddisposed on a lower portion of the housing; and an ammunition loadingstrip, the ammunition loading strip comprising a first surface, thefirst surface being substantially planar and shaped to correspond with acontour of a firearm magazine; a side wall disposed substantially alonga perimeter of the first surface and terminating at a distal end of thefirst surface defining an opening and an interior portion, the side wallbeing contoured at a distal portion opposite the opening defining afirst cartridge contour and a second cartridge contour; and, a handlecoupled to a distal portion of the side wall and the first surfaceadjacent to the first cartridge contour and the second cartridgecontour.

The foregoing has outlined rather broadly the more pertinent andimportant features of the present invention so that the detaileddescription of the invention that follows may be better understood andso that the present contribution to the art can be more fullyappreciated. Additional features of the invention will be describedhereinafter which form the subject of the claims of the invention. Itshould be appreciated by those skilled in the art that the conceptionand the disclosed specific methods and structures may be readilyutilized as a basis for modifying or designing other structures forcarrying out the same purposes of the present invention. It should berealized by those skilled in the art that such equivalent structures donot depart from the spirit and scope of the invention as set forth inthe appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the presentdisclosure will be more apparent from the following detailed descriptiontaken in conjunction with the accompanying drawings, in which:

FIG. 1 is an isometric view of a firearm magazine housing in accordancewith an embodiment;

FIG. 2 is an isometric view of a bullet cover of a firearm magazinehousing in accordance with an embodiment;

FIG. 3 is an isometric view of a bullet cover of a firearm magazinehousing in accordance with an embodiment;

FIG. 4 is an isometric view of a bullet guide of a firearm magazine inaccordance with an embodiment;

FIG. 5 is a cross sectional view of a firearm magazine housing inaccordance with an embodiment;

FIG. 6 is a cross sectional view of a firearm magazine housing inaccordance with an embodiment;

FIG. 7 is a cross sectional view of a firearm magazine housing inaccordance with an embodiment;

FIG. 8 is an isometric view of an ammunition loading strip in accordancewith an embodiment; and,

FIG. 9 is an isometric view of an ammunition loading strip and a bulletcontainer in accordance with an embodiment.

DETAILED DESCRIPTION

Exemplary embodiments are described herein to provide a detaileddescription of the present disclosure. Variations of these embodimentswill be apparent to those of skill in the art. Moreover, certainterminology is used in the following description for convenience onlyand is not limiting. For example, the words “right,” “left,” “top,”“bottom,” “upper,” “lower,” “inner” and “outer” designate directions inthe drawings to which reference is made. The word “a” is defined to mean“at least one.” The terminology includes the words above specificallymentioned, derivatives thereof, and words of similar import.

The present disclosure provides for an apparatus and system for a rapidloading firearm magazine that can be loaded to full capacity withoutloading cartridges one at a time. A cartridge (also called a round or ashell) is a type of ammunition packaging a bullet, a propellantsubstance (usually either smokeless powder or black powder) and a primerwithin a metallic, paper, or plastic case that is precisely made to fitwithin the firing chamber of a firearm. According to an embodiment, aloading strip with a magnetic interface is configured to engage with achannel in a magazine. A magazine may be defined as an ammunitionstorage and feeding device within or attached to a repeating firearm.Magazines can be removable (detachable) or integral to the firearm. Themagazine functions by moving the cartridges stored in the magazine intoa position where they may be loaded into the chamber by the action ofthe firearm. The magazine often has a spring engaged with a cartridgeguide to push each cartridge up to the chamber. As a cartridge is firedand the shell is evacuated from the chamber, the spring and cartridgeguide ensure the next cartridge in the magazine is fed into the chamber.The magazine has an interior portion where the ammunition is stored andan upper portion where the ammunition is generally loaded into themagazine when disengaged from a firearm, and loaded into the chamberwhen engaged with a firearm. The loading strip should have the samecurvature of the magazine so it can be fed substantially the entirelength of the interior of the magazine. According to an embodiment, afirearm user can preload cartridges onto a surface of the loading stripcontaining a magnetized portion. The magnetized portion should provideenough attractive force to hold the cartridge in place on the loadingstrip, while also allowing the cartridge to be readily removed from thestrip. In an embodiment, the loading strip may be configured to accepttwo rows of cartridges such that the cartridges are in the properconfiguration when placed in the magazine to load correctly in thefirearm chamber without jamming. Jamming occurs when the cartridge doesnot load properly into the chamber and the cartridge becomes jammed. Theloading strip may be loaded by the user or may come loaded from thefactory for faster loading, especially in a military setting.

According to an embodiment, a user loads a preloaded loading strip intoa magazine. The magazine may have a slidable side portion that enablesthe cartridge guide to be lowered to a locked position, such that thespring cannot exert force on the cartridges to move them upward in themagazine. When the cartridge guide is engaged in the locked position,the user may feed the loading strip into the magazine. Once thecartridges are loaded, the loading strip may be removed by placing theuser's hand over the opening of the magazine, such that no cartridgesmay be removed, and pulling upwards on the strip. The magnetic portionof the loading strip will become disengaged from the cartridges, and theloading strip will easily slide out of the cartridge leaving thecartridges behind in the magazine in the desired configuration. Once thecartridges are loaded into the magazine, and the loading strip isremoved, the cartridge guide may reengaged and the spring will exertpressure on the loaded cartridges to move them upward in the magazine,and into the chamber when the magazine is engaged with a firearm.

FIG. 1 is an isometric view of a firearm magazine housing in accordancewith an embodiment. In an embodiment, magazine 100 is configured toengage with the chamber of a firearm, for example an AR-15. Magazine 100has an upper opening 102 to facilitate loading of cartridges into themagazine body 106, and the feeding of cartridges into the chamber of afirearm. Magazine 100 may have an open side portion to enable the userto see the cartridges as they are loaded into the magazine. A slidingmagazine cap may be used to selectively cover the open side portion.Upper opening 102 has a substantially rectangular opening at one end toaccommodate a loading strip with attached cartridges. The rectangularopening can be substituted for any geometric configuration to correspondwith the shape of a loading strip. Upper opening 102 is engaged with thechamber of a firearm when in use. Magazine 100 has a channel 104configured to guide a loading strip into magazine body 106. In anembodiment, channel 104 is comprised of a shallow rectangular groove,but this configuration can be readily substituted for otherconfigurations to correspond with the shape of a cartridge loadingstrip, such as semi-circular or a keyed slot. Channel 104 runssubstantially the entire length of magazine 100 to enable a loadingstrip to be fed to the bottom of magazine body 106.

Still referring to FIG. 1, a groove 108 may be disposed along anexterior portion of magazine body 106 such that a side face or cap (asshown in FIGS. 2 and 3) may be slidably connected to magazine 100 toenable a user to have selective access to the interior portion ofmagazine body 106. Groove 108 may run on opposing sides of magazine body106, as illustrated in FIG. 1, and may be formed by the definition of agap between an exterior surface of magazine body 106 and magazine casing110. Magazine casing 110 may provide an additional exterior surface tomagazine body 106, and may be integral to magazine body 106 or aremovable shell to magazine body 106. Magazine 100 may also have acartridge guide lever 112 to enable selective engagement of a cartridgeguide in an interior portion of magazine body 106 between a lockedposition and an unlocked position. Cartridge guide lever 112 may bedepressed to free a cartridge guide from a locked position.

FIGS. 2 and 3 show an isometric view of a cartridge cover of a firearmmagazine housing in accordance with an embodiment. Cartridge cover 200may interface with groove 108 in FIG. 1 to enclose an open side portionof magazine 100, as shown in FIG. 1. Cartridge cover 200 may have anupper portion 202 to enable selective coupling with magazine 100, aswell as an opening 204 to enable a user to see how many cartridges, orrounds of ammunition, are housed in magazine body 106. Opening 204should be wide enough to accommodate a handle from a cartridge guidehoused in magazine body 106. Cartridge notations 206 may be included ona surface of cartridge cover 200 to correspond with the number ofcartridges housed in magazine body 206. FIG. 3 shows a rear surface 302of cartridge cover 200 that interfaces with groove 108 in FIG. 1 toenclose an open side portion of magazine 100.

FIG. 4 is an isometric view of a cartridge guide of a firearm magazinein accordance with an embodiment. According to an embodiment, acartridge guide 402 has a cartridge rest 404 defined by an inclinedupper portion. Cartridge rest 404 is configured to position cartridgeshoused in magazine 100, as shown in FIG. 1, in an inclined position suchthat the tip of the cartridge is at least one degree to 20 degreeshigher than the base to facilitate loading of the cartridge into thechamber of a firearm. Cartridge guide 402 may have a handle 408 toenable a user to pull down on cartridge guide 402 to engage it in alocked position. Cartridge guide 402 may be locked by interfacing guideaperture 406 with a locking mechanism. Guide aperture 406 may be definedas longitudinal facing surface with a slot or opening configured toselectively engage with a locking mechanism, such as that shown in FIG.5.

FIG. 5 is a cross sectional view of a firearm magazine housing inaccordance with an embodiment. According to an embodiment, cartridgeguide lever 112 has a protrusion or locking mechanism 502 that extendsinto magazine body 106. A spring 504 exerts lateral pressure oncartridge guide lever 112 such that lever 112 can be depressed toretract locking mechanism 502 in a lateral motion toward the side ofmagazine body 106. Spring 504 exerts lateral pressure on cartridge guidelever 112 such that locking mechanism 502 remains within magazine body106. Referring now to FIG. 6, cartridge guide 402 is housed withinmagazine body 106. A spring 602 exerts upward pressure on cartridgeguide 402 such that cartridges are continuously fed upward to a firearmchamber when the magazine is engaged with a firearm. Spring 602 can becompressed by pulling downward on handle 408. As shown in FIG. 7, guideaperture 406 can interface with locking mechanism 502 in order to lockcartridge guide 402 and keep spring 602 depressed. This allows a user toload an ammunition loading strip (as shown in FIGS. 7 and 8) intomagazine body 106 without interference from cartridge guide 402. Oncecartridges have been loaded, cartridge guide 402 can be unlocked bydepressing cartridge guide lever 112 and disengaging locking mechanism502 from guide aperture 406. Spring 602 is now free to exert upwardforce on the loaded cartridges to accommodate loading into a firearmchamber.

FIG. 8 is an isometric view of an ammunition loading strip in accordancewith an embodiment. According to an embodiment, loading strip 800 is anelongated apparatus having a handle 802, a cartridge surface 806, and amagnetic surface 810. Handle 802 allows a user to more easily griploading strip 800 and may include cut-outs 804 to improve grip.Cartridge surface 806 may be substantially planar and shaped tocorrespond with a magazine. Magnetic surface 810 may be disposedsubstantially the length of cartridge surface 806. Magnetic surface 810enables a steel cartridge to be coupled to cartridge surface 806 throughattractive magnetic forces. The magnetic force should be strong enoughto hold the cartridge 812 to cartridge surface 806 when a loadedcartridge 812 is held perpendicular to vertical when engaged withmagnetic surface 810. Side walls 808 are used to organize a row or rowsof attached cartridges to facilitate organized loading into a magazine.In a preferred embodiment, the loading strip is organized into two rows.Side walls 808 may form a contour or contours to define the beginning ofat least one row of cartridges. In some embodiments, the entire loadingstrip may be made of a magnetized material thereby eliminating magneticsurface 810 as a separate element. It is also anticipated that cartridgesurface 806 may be made from a magnetized material, also eliminatingmagnetic surface 810 as a separate element.

Still referring to FIG. 8, according to an exemplary method of use, auser may engage cartridges 812 with magnetic surface 810 by placing thebase of cartridges 812 on magnetic surface 810. The user can line upcartridges 812 on cartridge surface 806 according to rows defined by thecontours in side walls 808. In an exemplary embodiment, loading strip800 holds two rows of 15 cartridges 812. Once the cartridges are loadedon cartridge surface 806, the user can feed loading strip 800 into afirearm magazine, as exemplified by magazine 100 in FIG. 1. Once loadedinto the magazine, the user should place their hand over the upperopening of the magazine, as illustrated by upper opening 102 of magazine100 in FIG. 1, and pull firmly on handle 802. This will remove loadingstrip 802 from the interior portion of the magazine, but will leavecartridges 812 inside the magazine. This enables a user to load anentire 30 round magazine in one step without leaving any cartridgestrapping or packaging inside the magazine. This is very desirable whenthe user wants to reduce the reload time for a firearm. In anembodiment, a magazine loading spring is compressed and the cartridgeguide is locked as described in FIGS. 5-7 to facilitate loading ofloading strip 800 without interference from internal mechanisms in themagazine.

FIG. 9 is an isometric view of an ammunition loading strip and acartridge container in accordance with an embodiment. In someembodiments, cartridges 812 (as shown in FIG. 8) may be preloaded onloading strip 800 and housed in a box or packaging 900 until ready foruse. This may be how ammunition is loaded from the factory ormanufacturer, and enables the user to rapidly open ammunition box 900,remove preloaded loading strip 800, insert preloaded loading strip 800into the magazine, remove the loading strip, and engage the magazine tothe firearm. This would greatly reduce the time required to load amagazine, especially in a military setting.

The present disclosure includes that contained in the appended claims aswell as that of the foregoing description. Although this invention hasbeen described in its exemplary forms with a certain degree ofparticularity, it is understood that the present disclosure of has beenmade only by way of example and numerous changes in the details ofconstruction and combination and arrangement of parts may be employedwithout departing from the spirit and scope of the invention.

What is claimed is:
 1. A cartridge loading apparatus, with eachcartridge including a hollow shell carrying a bullet at a first endthereof and having a circular bottom at an opposite second end thereof,comprising: a first surface, the first surface being substantiallyplanar and shaped to correspond with a contour of a firearm magazine; aside wall disposed substantially along a perimeter of the first surfaceand terminating at a distal end of the first surface defining an openingand an interior portion, the side wall being contoured at a distalportion opposite the opening defining at least one cartridge contour; amagnetic portion disposed substantially along a length of the firstsurface defining at least one cartridge row within the interior portion;and, a handle coupled to a distal portion of the side wall and the firstsurface adjacent to the at least one cartridge contour.
 2. Theammunition loading apparatus of claim 1 wherein the magnetic portioncomprises substantially the area of the first surface.
 3. The ammunitionloading apparatus of claim 1 wherein the apparatus is made from amaterial selected from the group consisting of high density plastic,steel and aluminum.
 4. The ammunition loading apparatus of claim 1wherein the at least one cartridge contour defines rows for a first rowof cartridges and a second row of cartridges.
 5. The ammunition loadingapparatus of claim 1 further comprising a first row of cartridges and asecond row of cartridges.
 6. The ammunition loading apparatus of claim 5wherein the first row of cartridges and the second row of cartridges areremovably engaged with the magnetic portion.
 7. An apparatus for storingcartridges for a firearm, with each cartridge including a hollow shellcarrying a bullet at a first end thereof and having a circular bottom atan opposite second end thereof, comprising: an elongated housingconfigured to selectively engage with a firearm, the housing having sidewalls and a base defining sides, a bottom and an opening disposedsubstantially along a side portion, and the housing having a channeldisposed substantially the length of the housing and configured to beslidably coupled with an ammunition loading strip, the ammunitionloading strip having a first surface, a side wall disposed substantiallyalong a perimeter of the first surface and terminating at a distal endof the first surface defining an opening and an interior portion, theside wall being contoured at a distal portion opposite the openingdefining a first cartridge contour, and a magnetic portion disposedsubstantially along a length of the first surface defining a cartridgerow within the interior portion; a cartridge guide, the cartridge guidebeing slidably coupled with an interior portion of the housing, and thecartridge guide having a handle coupled to a cartridge rest; and, acartridge guide lever having a protrusion selectively engaged with anaperture of the cartridge guide, and disposed on a lower portion of thehousing.
 8. The firearm magazine of claim 7 wherein the cartridge guideis configurable between a first engaged position and a second lockedposition.
 9. The firearm magazine of claim 7 wherein the cartridge guidefurther comprises an inclined portion configured to feed a cartridgeinto a firearm chamber according to a predetermined angle.
 10. Thefirearm magazine of claim 7 further comprising a spring operably engagedwith the cartridge guide lever.
 11. The firearm magazine of claim 7further comprising cartridge number notations on an exterior surface ofthe housing.
 12. The firearm magazine of claim 7 further comprising acartridge cover coupled to the cartridge guide and slidably engaged withthe housing.
 13. The firearm magazine of claim 8 wherein the lockedposition corresponds to engagement of the aperture of the cartridgeguide and the protrusion of the cartridge guide lever.
 14. A firearmmagazine system comprising: a housing configured to selectively engagewith a firearm, the housing having side walls and a base defining sides,a bottom and an opening disposed substantially along a side portion, andthe housing having a channel disposed substantially the length of thehousing and configured to be slidably engaged with an ammunition loadingstrip; a cartridge guide, the bullet guide being slidably coupled withan interior portion of the housing, and the cartridge guide having ahandle coupled to a cartridge rest; a cartridge guide lever having aprotrusion selectively engaged with an aperture of the cartridge guide,and disposed on a lower portion of the housing; and, an ammunitionloading strip, the ammunition loading strip comprising: a first surface,the first surface being substantially planar and shaped to correspondwith a contour of a firearm magazine; a side wall disposed substantiallyalong a perimeter of the first surface and terminating at a distal endof the first surface defining an opening and an interior portion, theside wall being contoured at a distal portion opposite the openingdefining a first cartridge contour and a second cartridge contour; and,a handle coupled to a distal portion of the side wall and the firstsurface adjacent to the first cartridge contour and the second cartridgecontour.
 15. The firearm magazine assembly of claim 14 wherein the firstcartridge contour and the second cartridge contour define rows for afirst row of cartridges and a second row of cartridges.
 16. The firearmmagazine assembly of claim 14 wherein the magnetic portion comprisessubstantially the area of the first surface.
 17. The firearm magazineassembly of claim 14 wherein the cartridge guide further comprises aninclined portion configured to feed a cartridge into a firearm chamberaccording to a predetermined angle.
 18. The firearm magazine assembly ofclaim 14 further comprising a cartridge cover coupled to the cartridgeguide and slidably engaged with the housing.
 19. The firearm magazineassembly of claim 14 further comprising a spring operably engaged withthe cartridge guide lever.
 20. The firearm magazine assembly of claim 14further comprising cartridge number notations on an exterior surface ofthe housing.